Texas Instruments TAS6424-Q1 Class-D Audio Amplifier
Texas Instruments TAS6424-Q1 Class-D Audio Amplifier is a four-channel digital input Class-D audio amplifier designed for automotive head units and external amplifier modules. The device provides four channels at 27W into 4Ω at 10% THD+N. It also provides 45W into 2Ω at 10% THD+N from a 14.4V supply and 75W into 4Ω at 10% THD+N from a 25V supply. The Class-D topology dramatically improves efficiency over traditional linear amplifier solutions. The output switching frequency can be set either above AM band or below AM. Above AM band eliminates the AM-band interference and reduces output filtering and cost. Below AM band allows the designer to optimize efficiency. The wide supply voltage range of the Texas Instruments TAS6424-Q1, from 4.5V to 26.4V, helps minimize audio artifacts in start-stop applications.
Features
- Advanced load diagnostics
- Runs without input clocks
- An AC diagnostic for tweeter detection with impedance and phase response
- Easy to meet CISPR25-L5 EMC specification
- Qualified for automotive applications
- Audio inputs
- 4 channel I2S or 4/8-channel TDM input
- Input sample rates: 44.1kHz, 48kHz, 96kHz
- Input formats: 16-bit to 32-bit I2S and TDM
- Audio outputs
- Four-channel Bridge-Tied Load (BTL), with an option of Parallel BTL (PBTL)
- Up to 2.1MHz output switching frequency
- 75W, 10% THD into 4Ω at 25V
- 45W, 10% THD into 2Ω at 14.4V
- 150W, 10% THD into 2Ω at 25VPBTL
- Audio performance into 4Ω at 14.4V
- THD+N < 0.03% at 1W
- 42µVRMS output noise
- –90dB crosstalk
- Load diagnostics
- Output open and shorted load
- Output-to-battery or ground shorts
- Line output detection up to 6kΩ
- Host-independent operation
- Programmability for flexible production line testing
- Protection
- Output current limiting
- Output short protection
- 40V load dump
- Open ground and power tolerant
- DC offset
- Overtemperature
- Undervoltage and overvoltage
- General operation
- 4.5V to 26.4V supply voltage
- I2C control with four address options
- Clip detection and thermal warning
Applications
- Automotive head units
- Automotive external amplifier modules
Related Products
Texas Instruments TAS6421-Q1 Automotive Burr-Brown™ Audio Amplifiers
Implements a 2.1MHz PWM switching frequency, enabling a cost solution for a very small PCB size.
Texas Instruments TAS6424M-Q1 Automotive Class-D Audio Amplifier
A 2.1MHz PWM switching frequency, enabling a cost optimized solution in a very small PCB size.
Functional Block Diagram
Publicado: 2017-05-05
| Actualizado: 2022-05-02